Tell you what, a few months ago I made a very similair post on here with the question what a good lens would be for portraits, and through the many useful tips and recommendations I got from it I bought the 85mm 1.8. And I didn't regret it a single time. But I shoot 99% outdoors with this lens so I've got more then enough space to walk around the object im photographing, but of course sometimes the 136mm (on 1.6 body) gives me a bit trouble since it's really the recommended max distance you should have for portraits.


It makes superbe head/shoulder shots, amazingly sharp and a near perfect bokeh in the background.


But if you are planning to go indoors you should indeed take a look at the 50mm 1.4 (which might still be too long) or perhaps a zoom lens. Beside the 85mm I also own the Tamron 17-50mm 2.8 which I use when it's getting to tight indoors or if I want to throw in some wider angels.



Good luck with your decision,
Jørundr.